Cutting or trimming device



Apiil 21," 1925. 1,534,576

F. E. EDGREN I CUTTING OR TRIMMING DEVICE Filed 001;. 23, 1922 Patented Apr. 21, 1925,

UNITED STATES FRED ERIC EDGREN, OF CHICAGO, ILLINOIS.

CUTTING OR- TRIMMING DEVICE.

Application filed October 23,1922. Serial No. 596,196.

To all whom it may concern.

1 Be it known that I, FRED ERIC EDGREN,

a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Cutting or Trimming Device, of which the following is a description, reference being had to the accompanying drawing, which forms a part of my specification.

My invention relates to a device more especially intended for use 'as a paper trimmer employed for the purpose of trimming the edges of wall paper and has for its object the provision of means whereby the blade is yieldingly held in place in order that the device may be readily applied to the track which is formed on the straightedge usually employed by paper hangers when trimming wall paper.

Another object of my invention is to pro vide means whereby the trimming blade may be readily moved out of normal position in order that the application of the device to the straight-edge may be easily accomplished and the blade automatically returned to normal position when said means is released; while at the same time.

means are provided whereby the normal or proper position of the cutting blade will be determined and too far movement of the blade prevented in order that the edge of the cutting blade is prevented from contacting with the gauge or walls of the body portion of the device whereby injury to the cutting edge of the blade might be caused.

A further object of my invention is to provide a device of the character referred to which will be simple in construction; easy assembly and disassociation made possible, all as will more readily appear from the following detailed description of the drawing, wherein Figure 1 is a side elevation of my improved device.

Figure 2 is a vertical sectional view taken substantially on the line 2-2 of Figure 1, illustrating the device applied to the usual straight-edge.

Figure 3 is a sectional view taken on the offset line 33 of Figure 2 looking in the direction of the arrows.

Figure 4 is a detail view in perspective of the cutting device or blade and its arbor.

Figure 5 is a detail view in perspective of the blade-controlling plunger.

In the particular exemplification of the invention as disclosed in the drawing, the cutting element or blade 10, is preferably removably secured by means of screw 11 to an arbor 12 which is disposed from one side of the blade 10 and is slidably mounted in the socketed boss 13 of the outer shell or case 14. The shell or case 14 may be of any suitable construction and provided with the hand-engaging portion as at 15 and with the forwardlydisposed extension or toe as at 16 to which the usual gauge 17 of the device is pivotally secured as at 18. The opposite end of the gauge 17 is yieldingly held in its relation with the case 14 by means of a pin or screw 19 disposed through a slot 20 in the case 14; and this free or rear end of the gauge 17 is usually under spring pressure, which is induced by the spring 21 shown in Figure 1. The gauge 17 is provided with a flange or guide 22, the free or unattached side whereof is disposed inwardly toward the blade as clearly shown in Figure 2 and is adapted to slide beneath the track 23 disso posed longitudinally of the straight-edge. As is apparent from Figure 2, when the device is applied to the track of the straightedge, the cutting element or blade 10 is brought in close contact with the straightedge and unless the blade is somounted and means are provided whereby the cutting element or blade may be readily shifted or moved from normal position, the application of the device to the straight-edge would be somewhat difficult, as is the case where the cutting element or blade 10 is stationarily mounted in the case 14. I therefore mount the arbor 12 slidably in the socket of boss 13 and provide a suitable spring 24 at the inner end of the arbor 12, while the inner end of the arbor is preferably counterbored to receive one end of the spring 24. As is evident from the construction shown, the spring 24 will exert a constant outward pressure on the arbor 12 and therefore yieldingly hold the cutting element or blade 10 in its normal position, namely in close relation with the guide 17 and in close relation with the straight-edge.

The cutting element or blade 10 is prefer ably in the nature of a thin sheet disc bent or formed into more or less concavo-convex form; the convex side being shown slightly tapered so that the perimeterat the juncture of the two sides of the blade will present a substantially flat edge which will permit the application of the blade to a suitable hone or stone whereby the same may be quickly and accurately sharpened and a suitable cutting edge maintained. In order that the blade may be moved inwardly against the action of the spring-24 a suflicient distance, the side wall of the case 14 about the socket in the boss 13 is shown preferably dished as at 25, which permits the blade 10 'to be pressed inwardly as shown in dotted lines in Figure 2.

The gauge 17, on the inner side and at a point coincident with the blade-holding screw 11, is provided with a boss 26 adapted to engage with the head or end of the screw 11 and act as a stop for the blade against the outward pressu're of spring 24 so as to prevent the cutting edge of the blade 10 coming into contact with the gauge. The gauge 17 at the point provided with the boss 26 is apertured for the passage of a plunger 27 wlnch is shown 1n detail 1n Figure 5 and consists of the enlarged inner end 28, preferably larger than the aperture in the gauge member 17, to prevent the accidental with- 'drawal of the plunger, while at the same time being sufficiently large to constantly engagewith the end or head of the screw 11, regardless of whether the gauge or the blade-holding case 14 has been depressed against the action of the spring 21, during the act of cutting or trimming, or whether the device is in inoperative position, namely before a downward pressure has been exerted on the case 14 and the axis of the plunger 27 is non-aligned with the axis of the bladeholding arbor and screw. The reduced or smaller end of the plunger 27 extends through the aperture in the gauge 17 a distance suflicient to permit it to 'be engaged by the finger of the operator when the device is to be applied to or withdrawn from the straight-edge. In order to easily apply the device to the track 23 of the straightedge, the operator presses the plunger 27 inwardly, which will force the blade 10 ,in wardly against the action of spring 24, namely into the position indicated in dotted lines in Figure '2, where the blade will be a sufficient distance from the straight-edge substantially equal to the extent of overlap between 'the flange 22 and the track 23,

thereby readily permitting the disengagement of the guide 22 with the track 23 of the straight-edge.

The advantages of my improved device are readily apparent from the exemplification disclosed in the drawing and it has been described in terms employed merely as terms of description and not as terms of limitation, as structural modifications are possible and may be made without, however, departing from the spirit of my invention.

hat I claim is 1. A device of the character described, comprising a shell or case, a gauge portion,

the forward ends of the shell and gauge portion being pivotally secured together, a cutting blade rotatably mounted in the side wall of said shell or case, means arranged in the side wall of the shell whereby the cutting blade is forced toward the gauge portion and yieldingly held in normal position, and reciprocable means mounted in the side wall of the gauge portion, whereby the cutting blade may be forced laterally toward theside wall of the shell or case, out of normal position against the action of said first means.

.2. A device of the character described, comprising a main shell or case provided with a socketedv boss in the side wall thereof, a gauge portion pivotally secured at the forward end to the forward end of the shell and provided with an opening in the side wall thereof at a point coincident with the boss of the shell, an arbor slidably mounted in the socketed boss, a cutting disc removably secured to one end ofthe arbor, pressure means at the inner end of the socket in said boss whereby the arbor and disc are yieldingly forced toward the gauge portion, and a plunger mounted in the opening in the side wall of the gauge portion, normally in alignment with said arbor, whereby the arbor and the cutting disc may be forced laterally out of normal position.

3. A device of the character described, comprising a main shell or case having an outwardly extending socketedboss in the side wall thereof, the side wall about the inner socketed end of the boss being dished, a gauge portion pivotally secured to the shell or case, an arbor slidably mounted in the socket of said boss, :1. spring disposed intermediate of the inner end of the arbor and the outer end of the boss whereby the arbor is normally forced toward the gauge portion, a cutting disc removably secured to the outer end of the arbor and provided with a convexed side disposed toward the dished side of the shell, the gauge portion being provided with an inwardly disposed apertured boss normally aligned with the dished side wall of the shell and with said arbor, whereby too far. movement of the arbor with the blade is prevented and the latter held in spaced relation with the gauge portion, and a reciprocable plunger mounted in the apertured boss of the gauge portion and extending through to the exterior, the inner end of the plunger being enlarged and arranged in constant engagement with the axis of said disc on the side opposite to that on which the arbor is located, whereby inward movement of the plunger will cause the disc to move toward the dished wall of the shell and the arbor 10 to move lengthwise of the socket in the boss of the shell against the action ofsaid spring.

FRED ERIC EDGREN. Witnesses:

G. HEIDMAN, F. A. FLoRnLL. 

